"""
Copyright (c) 2022 Huawei Technologies Co.,Ltd.

openGauss is licensed under Mulan PSL v2.
You can use this software according to the terms and conditions of the Mulan PSL v2.
You may obtain a copy of Mulan PSL v2 at:

          http://license.coscl.org.cn/MulanPSL2

THIS SOFTWARE IS PROVIDED ON AN "AS IS" BASIS, WITHOUT WARRANTIES OF ANY KIND,
EITHER EXPRESS OR IMPLIED, INCLUDING BUT NOT LIMITED TO NON-INFRINGEMENT,
MERCHANTABILITY OR FIT FOR A PARTICULAR PURPOSE.
See the Mulan PSL v2 for more details.
"""
"""
Case Type   : explain table
Case Name   : explain查询mot表结构信息
Create At   : 2023-01-09
@zou_jialiang0501162244
Description :
    1.设置enable_incremental_checkpoint=off,重启数据库
    2.创建兼容B库
    3.B库下创建MOT表并插入数据
    4.explain查看MOT表结构
    5.清理环境
Expect      :
    1.成功
    2.成功
    3.成功
    4.返回表结构
    5.成功
History     :
    modified by @zou_jialiang050,2023.03.28，修改断言信息确保Degraded断言成功
    modified by @zou_jialiang050,2023.03.31，优化断言信息
"""

import os
import unittest
from testcase.utils.CommonSH import CommonSH
from testcase.utils.Common import Common
from testcase.utils.Constant import Constant
from testcase.utils.Logger import Logger


class Explain(unittest.TestCase):

    def setUp(self):
        self.pri_sh = CommonSH('PrimaryDbUser')
        self.comm = Common()
        self.constant = Constant()
        self.log = Logger()
        self.log.info(f'-----{os.path.basename(__file__)} start-----')
        self.db_name = 'db_explain_0011'
        self.tb_name = 't_explain_0011'

    def test_explain_table(self):
        text1 = '-----step1:设置参数并重启数据库;expect:成功-----'
        self.log.info(text1)
        self.param = self.comm.show_param('enable_incremental_checkpoint')
        if 'off' not in self.param:
            guc_res = self.pri_sh.execute_gsguc(
                'set', self.constant.GSGUC_SUCCESS_MSG,
                'enable_incremental_checkpoint = off')
            self.log.info(guc_res)
            self.assertTrue(guc_res, f'设置guc参数失败:{text1}')
            restart_res = self.pri_sh.restart_db_cluster(False)
            self.log.info(restart_res)
            stat_res = self.pri_sh.get_db_cluster_status()
            self.assertTrue("Degraded" in stat_res or "Normal" in stat_res,
                            f'执行失败:{text1}')

        text2 = '-----step2:创建兼容B库 expect:创建成功-----'
        self.log.info(text2)
        create_db = f"drop database if exists {self.db_name}; " \
                    f"create database {self.db_name} dbcompatibility='B';"
        db_res = self.pri_sh.execut_db_sql(create_db)
        self.log.info(db_res)
        self.assertIn(self.constant.CREATE_DATABASE_SUCCESS, db_res,
                      f'执行失败:{text2}')

        text3 = '-----step3:B库下创建MOT表并插入数据;expect:成功-----'
        self.log.info(text3)
        sql = f"drop foreign table if exists {self.tb_name} cascade; " \
              f"create foreign table {self.tb_name}(" \
              f"id int not null,name varchar(10)); " \
              f"insert into {self.tb_name} values(1, 'Bitmap');"
        sql_res = self.pri_sh.execut_db_sql(sql, dbname=self.db_name)
        self.log.info(sql_res)
        self.assertIn(self.constant.CREATE_FOREIGN_SUCCESS_MSG, sql_res,
                      f'建表失败:{text3}')
        self.assertIn(self.constant.INSERT_SUCCESS_MSG, sql_res,
                      f'表中插入数据失败:{text3}')

        text4 = 'step4:explain查看MOT表结构;expect:返回表结构'
        self.log.info(text4)
        explain_tb = self.pri_sh.execut_db_sql(f"explain {self.tb_name}",
                                               dbname=self.db_name)
        self.log.info(explain_tb)
        exp_msg1 = "id    | integer               | NO   |     | NULL"
        exp_msg2 = "name  | character varying(10) | YES  |     | NULL"
        self.assertIn(exp_msg1, explain_tb, f'执行失败:{text4}')
        self.assertIn(exp_msg2, explain_tb, f'执行失败:{text4}')

    def tearDown(self):
        text5 = '-----step5:清理环境 expect:成功-----'
        self.log.info(text5)
        drop_db = self.pri_sh.execut_db_sql(f"drop database {self.db_name};")
        self.log.info(drop_db)
        guc_res = self.pri_sh.execute_gsguc(
            'set', self.constant.GSGUC_SUCCESS_MSG,
            f'enable_incremental_checkpoint={self.param}')
        self.log.info(guc_res)
        restart_res = self.pri_sh.restart_db_cluster(False)
        self.log.info(restart_res)
        stat_res = self.pri_sh.get_db_cluster_status()
        curr_value = self.comm.show_param('enable_incremental_checkpoint')
        self.log.info(curr_value)
        self.assertIn(self.constant.DROP_DATABASE_SUCCESS, drop_db,
                      f'删除数据库失败:{text5}')
        self.assertTrue(guc_res, f'恢复guc参数失败:{text5}')
        self.assertTrue("Degraded" in stat_res or "Normal" in stat_res,
                        f'执行失败:{text5}')
        self.assertEqual(self.param, curr_value, f'执行失败:{text5}')
        self.log.info(f'-----{os.path.basename(__file__)} end-----')
